Adam Bonica has posted some must-see graphs at Ideological Cartography. The graphs really drive home just how polarized the new US House of Representatives will be. The mean Democrat and mean Republican (and I suppose “mean” has both meanings here!) will be farther apart than any recent House, and the median of the entire House will be much more to the right than any in the past–notably more than the one elected in 1994. This follows the House elected in 2006, which was by far the most left-leaning House we have seen.
Another of Bonica’s graphs shows the extent to which entering Republicans are heavily skewed right. Exiting Democrats were less concentrated at any ideological position within their party, but the ranks of the moderates are going to be notably thinner.
Bonica concludes that “The polarization resulting from the 2010 Midterms is fundamentally different and more worrisome than what had preceded it.” Worrisome indeed.
As for the Senate, he has an animated view of polarization since 1967.